Prism grid is a stcker type of product applied to the inside of the glass panes. Is looks like v-groove glass and is a fraction of the cost. A cool concept. I know Certainteed in Sacramento has a new prism grid machine and it is pretty slick to see.

EarWax...Where are you located? Do you install windows or have you had them installed on your home? Will you contact me to discuss. If you email me @ quaizy1@aol.com, I'll email you back with my phone number.